cksum -c /dev/null 2>/dev/full should not abort (#10643)

src/uucore/src/lib/features/checksum/validate.rs

@@ -5,10 +5,12 @@
 
 // spell-checker:ignore rsplit hexdigit bitlen invalidchecksum inva idchecksum xffname
 
+use crate::util_name;
+
 use std::ffi::OsStr;
 use std::fmt::Display;
 use std::fs::File;
-use std::io::{self, BufReader, Read, Write, stdin};
+use std::io::{self, BufReader, Read, Write, stderr, stdin};
 
 use os_display::Quotable;
 
@@ -17,8 +19,7 @@ use crate::error::{FromIo, UError, UResult, USimpleError};
 use crate::quoting_style::{QuotingStyle, locale_aware_escape_name};
 use crate::sum::DigestOutput;
 use crate::{
-    os_str_as_bytes, os_str_from_bytes, read_os_string_lines, show, show_error, show_warning_caps,
-    translate,
+    os_str_as_bytes, os_str_from_bytes, read_os_string_lines, show, show_warning_caps, translate,
 };
 
 /// To what level should checksum validation print logging info.
@@ -173,8 +174,10 @@ fn print_cksum_report(res: &ChecksumResult) {
 /// Print a "no properly formatted lines" message in stderr
 #[inline]
 fn log_no_properly_formatted(filename: impl Display) {
-    show_error!(
-        "{}",
+    let _ = writeln!(
+        stderr(),
+        "{}: {}",
+        util_name(),
         translate!("checksum-no-properly-formatted", "checksum_file" => filename)
     );
 }
@@ -182,8 +185,10 @@ fn log_no_properly_formatted(filename: impl Display) {
 /// Print a "no file was verified" message in stderr
 #[inline]
 fn log_no_file_verified(filename: impl Display) {
-    show_error!(
-        "{}",
+    let _ = writeln!(
+        stderr(),
+        "{}: {}",
+        util_name(),
         translate!("checksum-no-file-verified", "checksum_file" => filename)
     );
 }
@@ -839,7 +844,7 @@ fn process_checksum_file(
             Ok(f) => f,
             Err(e) => {
                 // Could not read the file, show the error and continue to the next file
-                show_error!("{e}");
+                let _ = writeln!(stderr(), "{}: {e}", util_name());
                 return Err(FileCheckError::CantOpenChecksumFile);
             }
         }
@@ -891,8 +896,10 @@ fn process_checksum_file(
                     } else {
                         "Unknown algorithm"
                     };
-                    show_error!(
-                        "{}",
+                    let _ = writeln!(
+                        stderr(),
+                        "{}: {}",
+                        util_name(),
                         translate!("checksum-error-algo-bad-format", "file" => filename_input.maybe_quote(), "line" => i + 1, "algo" => algo)
                     );
                 }